设备树学习之环境搭建

配置编译器

u-boot 1.1.6	gcc-linaro-4.9.4
linux4.19	gcc-linaro-4.9.4
APP/root filesystem	arm-linux-gcc-4.3.2

查看原来的环境变量

$ echo $PATH/home/book/bin:/home/book/.local/bin:/opt/slickedit-pro2017/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/usr/local/arm/4.3.2/bin/:/snap/binbook@100ask:~/stu/post/tools/gcc$

解压这个gcc4.9到我们指定的目录,这里为

/home/book/stu/post/tools/gcc/gcc-linaro-4.9.4-2017.01-x86_64_arm-linux-gnueabi/

所以方便以后复制

编译内核与uboot使用的gcc4.9

export PATH=/home/book/bin:/home/book/.local/bin:/opt/slickedit-pro2017/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/home/book/stu/post/tools/gcc/gcc-linaro-4.9.4-2017.01-x86_64_arm-linux-gnueabi/bin/:/snap/bin

arm-linux-gnueabi-gcc -v 可以看到新的了

编译app/root使用老的gcc4.3

export PATH= /home/book/bin:/home/book/.local/bin:/opt/slickedit-pro2017/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/usr/local/arm/4.3.2/bin/:/snap/bin

编译

tar xjf u-boot-1.1.6.tar.bz2 cd u-boot-1.1.6 patch -p1 < ../u-boot-1.1.6_device_tree_for_jz2440.patch make 100ask24x0_config make cd linux-4.19-rc3patch -p1 < ../linux-4.19-rc3_device_tree_for_jz2440.patchcp config_ok .configmake uImagemake dtbs // 编译, 可以得到arch/arm/boot/dts/jz2440.dtbmake dtbs  CALL    scripts/checksyscalls.sh
    
     :1332:2: warning: #warning syscall io_pgetevents not implemented [-Wcpp]  DTC     arch/arm/boot/dts/jz2440.dtb  DTC     arch/arm/boot/dts/s3c2416-smdk2416.dtb

如果提示"mkimage not found", 先编译u-boot, 把tools/mkimage复制到/bin目录

如果提示"openssl/bio.h: No such file or directory" ,则需要

sudo apt-get update
sudo apt-get install libssl-dev